Learn More About Aerial Photography
The aerial photography business has its own set of technical terms and phrases. Aerial Photos of New Jersey offers this brief introduction for newcomers.
CCD
Charge Coupled Device. In a digital camera, the CCD records the image. It consists of a series of light sensitive picture elements laid out in a grid pattern.
Copyright
Legal ownership of an image that by Federal Law is automatically created as soon as the image is created. The photographer always owns the copyright, and sells the usage of an image, also called a license. Usage is priced different according to how the end user is going to use the image. Someone using one of our New York City aerial photographs as a screensaver is going to pay substantially less than a corporation using that same image on the cover of their annual report.
Mega-Pixels
Term used to describe the size of a CCD in a digital camera. The Kodak PRO SLR is a 14 Mega-Pixel (MP) camera. The CCD has 14 million pixels! It is one of the highest resolution digital cameras in the world.
Mosaic
The process of stitching together a series of vertical aerial images to create 1 seamless image. Done correctly, the viewer cannot tell where one image starts and another ends.
Oblique Aerial Photography
A photograph taken looking down and across from the side window of an aircraft. It is usually about 45 degrees, and shows the walls of buildings, as well as roofs.
High Oblique Aerial Photography
Similar to above but taken looking down at a steeper than average angle, usually around 20-25 degrees. Closer to, but not quite vertical. Walls are still visible.
Low Oblique Aerial Photography
An oblique photo taken looking across at a more shallow angle than a normal oblique. Usually shows the horizon in the background. Used for portraits of buildings.
Pixel
Picture Element that contains information about the light and color at a single point in an image.
Resolution
In vertical aerial photography, a 1 foot resolution means that 1 pixel covers 1' on the ground. 1', 2', and 1 meter are very popular resolutions for vertical aerial photography. Resolution is usually determined by what the client wants to see in the photograph. A engineering client who wishes to count manhole covers will need 6" or 3" resolution. A shopping Center client who wants to show that all of his parking spaces are full with cars can do so with a 2 ' or 18" resolution.
Vertical Aerial Photography
A photograph taken straight downwards through the belly of the aircraft. Must have less than 5 degrees of tilt to be considered a true vertical image. Side walls are not visible in a vertical view.
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